Physics professor working with a student

Faculty


Steve Feller

Steven Feller

B.D. Silliman Professor of Physics

B.S., Clarkson College of Technology
Sc.M., Ph.D., Brown University

Email: sfeller@coe.edu

Steve Feller’ research in physics centers on the atomic structure and physical properties of glass. Feller’s group work on determining the atomic structure of glass and its relationship to the physical properties.  They make new-to-the-world glasses with unusual compositions and use a variety of in-house methods that can cool liquids at 100,000 oC/s or heat our samples to nearly 3000 oC.  The Feller Group determines the atomic structure using a number of modern techniques: Nuclear Magnetic Resonanc, Neutron Scattering, Raman Spectroscopy, Infrared Spectroscopy and modern calculational tools. 

They compare the structure to a number of important physical properties including: density and packing efficiencies; thermal properties including the glass transition temperature, the crystallization temperatures, the specific heat; the velocity of sound in glass and the various strength parameters.  The comparison is done using computer models, many of which are developed in house.

After teaching at Coe College for 39 years, Feller does full time research with students. Since 1979, he worked with over 150 students, published over 150 papers in the refereed literature of the field. He has also edited a number of books on glass science. Steve and his students have given over 200 presentations at well over 100 national and international conferences. Funding from 93 grants for over $8,200,000 has been secured since 1983 from a large number of foundations including the National Science Foundation. He also has a research-level interest in numismatics, the study of the history of money. In this area he has published over 100 articles, and several books.

S. FELLER AWARDS:

He has been honored a number of ways including: Society of Glass Technology (SGT) Centenary Fellow (2016). Fellow of the American Ceramic Society (2003) and the British Society of Glass Technology (2003), Physics Club Chapter Advisor of the Year by the national Society of Physics Students (2000), Distinguished Iowa Scientist by the Iowa Academy of Sciences (1999), Fulbright Scholar (1996), Iowa Professor of the Year (1995) by the Carnegie Foundation for the Advancement of Teaching. American Physical Society Prize to a Faculty Member for Research in an Undergraduate Institution (1993). C.J. Lynch Prize as Teacher of the Year (1993).

From 1996-2002 he served on the national board of the Society of Physics Students. In 2002 he was elected the president of Sigma Pi Sigma, the national physics honor society, a position he was reelected to in 2004. He was the chair of the organizing committee of the 2008, 2012, 2016, and 2019 Sigma Pi Sigma Congresses.

RECENT PUBLICATIONS:

  • S. Feller, The chapter, Borate Glasses: Structure, Properties, and Uses accepted Springer Handbook of Glass (2018).
  • “A Computational Analysis of an Anomaly in the Glass Transition Temperature Widths of Low Modifier Alkali Borate Glasses,” accepted by Phys. Chem Glasses –European Journal of Glass Science Part B (2017).
  • “The Germanate Anomaly in Alkaline-Earth Germanate Glasses,” Journal of Physical Chemistry C 121 (17) 9462 (2017).
  • “On the Short-Range Structure of TeO2 Glass,” J Phys. Chem. C DOI: 10.1021/acs.jpcc.7b08978 (2017).

Mario Affatigato

Mario Affatigato

Fran Allison and Francis Halpin Professor of Physics

B.A., Coe College
Ph.D., Vanderbilt University

Email: maffatig@coe.edu

Dr. Affatigato’s personal research interests lie in the area of the optical and electrical properties of glasses and the relationship between such properties and the structure of the glass.

Affatigato’s research groups primarily work on the use of laser light in the manufacture and study of glasses. In one project, for instance, laser light is used to melt a glass bead while it is being levitated by a gas. In another, Raman spectroscopy is used to look at changes in the structure of glasses. In a third project, student researchers look at the molecules that come off a glass as it is hit by UV laser light. Dr. Affatigato and his students also work on projects such as development of glass that kills bacteria, or developing conducting glasses that can be used in particle detectors. Mario and his students also map the surface topography of glasses using atomic force microscopy.

RECENT PUBLICATIONS:

  • “Control of self-powdering phenomenon in ferroelastic β′-Gd2(MoO4)3 crystallization in boro-tellurite glasses”, Journal of Non-Crystalline Solids, In Press (2018).
  • “Long Afterglow In Hexagonal SrAl2O4:Eu2+, Dy3+ Synthesized By Crystallization Of Glass And Solidification Of Supercooled Melts”, J. of Luminescence 177 (2016) 286–289. 
  • “Measurements of the Rate Capability of Various Resistive Plate Chambers”, Journal of Instrumentation, 10 (10), October 2015.
  • “Electronically Conductive Vanadate Glasses for Resistive Plate Chamber Particle Detectors”, International Journal of Applied Glass Science, 1–8 (2015), DOI:10.1111/ijag.12109

Ugur Akgun

Ugur Akgun

Associate Professor of Physics

B.S., Middle East Technical University
Ph.D., University of Iowa

Email: uakgun@coe.edu

Ugur's research area expands from experimental high energy physics to computational biophysics. He is involved in Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) of CERN, in Geneva, Switzerland. Ugur is also member of SELEX and MIPP experiments at Fermi National Laboratory, in Batavia, Illinois. His main expertise is on radiation hard particle detectors. His recent projects include novel glass detectors, such as neutron detectors for homeland security, 3 dimensional dosimeters, and proton imaging detector. Ugur’s group develop the novel materials, design, and perform the simulations of these detectors.

Ugur's secondary research area is computational biophysics. His group use various molecular dynamics simulation techniques to determine the mechanisms of membrane proteins. Ugur and his students are recently simulating P-Glycoproteins, Urea and Ammonia channels, and AQP0-CaM system.

RECENT PUBLICATIONS:

  • "CARNA – A Compact Glass Proton Imager", Proceedings of IEEE Nuclear Science Symposium and Medical Imaging Conference, (2017).
  • “Investigation of Ce3+ luminescence in borate-rich borosilicate glasses”, Journal of Non-Crystalline Solids 471 (2017) 357–361, (2017).
  • "High density scintillating glass proton imaging detector", Proc. SPIE 10132, Medical Imaging 2017: Physics of Medical Imaging, 101323V; doi:10.1117/12.2252777; 2017
  • “Radiation Hard Elastomer Scintillators for a New Generation of Particle Detectors”, JINST 23 P0716, Journal of Instrumentation, 2017

Firdevs Duru

Firdevs Duru

Assistant Professor of Physics

B.S., Bosphorous University
M.S., Ph.D., University of Iowa

Email: fduru@coe.edu

Firdevs’ main research interest is the ionosphere around the planets. Dr. Duru’s group analyzes the data coming from the spacecrafts Mars Express, MAVEN, Juno and Cassini.

RECENT PUBLICATIONS:

  • “Post Situ Neutron and Gamma Radiation Damage Tests on Different Quartz Types”, JINST 11 T10006, Journal of Instrumentation, 2016
  • “Solar wind interaction and atmospheric escape”, Book Chapter, Cambridge University Press, edited by Bob Haberle, Francois Forget, Rich Zurek, and Todd Clancy (2017).
  • F. Duru, D. A. Gurnett, D. D. Morgan, I. H. Duru, J. D. Winningham, and R. Frahm, "Study on the Motion of the Magnetosheath Boundary at Mars from Disappearance and Reappearance of Electron Plasma Oscillations" in preparation, 2013.
  • F.Duru, D. A. Gurnett, D. D. Morgan, J. D. Winningham, R. Frahm, and A. F. Nagy, "Night Side Ionosphere of Mars Studied with Local Electron Densities: A General Overview and Electron Density Depressions", J. Geophys. Res.-Space Physcis, 116, A10316, doi:10.1029/2011JA016835, 2011.
  • E. Dubinin, M. Fraenz, A. Fedorov, R. Lundin, N. Edberg, F. Duru, and O. Vaisberg, "Ion Energization and Escape on Mars and Venus", Space Science Reviews, 162, pg. 173-211, doi:10.1007/s11214-011-9831-7, 2011.
  • C. Bertucci, F. Duru, N. Edberg, M. Fraenz, C. Martinecz, K. Szego, O. Vaisberg, "The induced magnetospheres of Mars, Venus, and Titan", Space Science Reviews, 162, Issue 1-4, doi:10.1007/s11214-011-9845-1, 2011.

Caio Barca Bragatto

Caio Barca Bragatto

Assistant Prrofessor of Physics

B.S. Industrial Chemistry, Universidade de Sao Paulo, Sao Carlos, SP, 2005-2009
M.S. Materials Science and Engineering, Universidade Federal de Sao Carlos, Sao Carlos, SP, 2010-2012
Ph.D. in Materials Science and Engineering, Universidade Federal de Sao Carlos, Sao Carlos, SP, 2012-2016
Postdoctoral researcher, Friedrich-Schiller Universitäat Jena, 2016-July 2018

Email: cbragatto@coe.edu

Caio is a materials science engineer, and his research focuses on ionic conductivity of glasses. The ionic conductivity is crucial property for developing new generation fuel cells.

RECENT PUBLICATIONS:

  • Mixed-modifier effect in alkaline earth metaphosphate glasses,” Journal of Non-Crystalline Solids 481 447 (2018).
  • “Dissociation equilibrium and charge carrier formation in AgI–AgPO3 glasses,” The Journal of Chemical Physics C 121 (25) 13507 (2017).
  • “Structural relaxation in AgPO3 glass followed by in situ ionic conductivity measurements,” Journal of Non-Crystalline Solids 437 43 (2016).
  • “Electronic conductivity of vanadium-tellurite glass-ceramics,” Journal of Non-Crystalline Solids 378 196 (2013).

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James Cottingham

Professor of Physics, Emeritus

B.A., M.S., University of Chicago
M.S., Ph.D., University of Iowa

James Cottingham performs research on musical acoustics. His specialty is free-reed instruments, including several from around the world, especially from Southeast Asia.


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James Wetzel

Part-time Instructor in Physics

B.S., Ph.D., University of Iowa

James Wetzel is a member of the CMS experiment at the Large Hadron Collider experiment at CERN. James teaches astronomy classes at Coe.